Tire Bulge problems of the 1996 Oldsmobile 88

The contact owns a 1996 Oldsmobile 88. The vehicle has cooper multi-mile grand am radial se, size p205/70r15 tires. While driving 60 mph, the rear of the vehicle began vibrating. The tire mechanic balanced the tires, however, the failure continued. The tire mechanic stated that the tires were defective and he replaced the driver and passenger side rear tires. Approximately one year later, the steering wheel veered to the left and right. The tire mechanic stated that there was a bulge on the driver side tire and he replaced both the driver and passenger side tires. The failure mileage was 92,000 and current mileage is 97,016. Updated 01/11/08.